/*
 *  Copyright 2005 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.xbongbong.paas.toolbox.util;

import java.util.Locale;

/**
 * @author Jeff Butler
 */
public class JavaBeansUtil {
	
	/**
	 *  
	 */
	private JavaBeansUtil() {
		super();
	}
	
	/**
	 * JavaBeans rules:
	 * 
	 * eMail > geteMail() firstName > getFirstName() URL > getURL() XAxis >
	 * getXAxis() a > getA() B > invalid - this method assumes that this is not
	 * the case. Call getValidPropertyName first. Yaxis > invalid - this method
	 * assumes that this is not the case. Call getValidPropertyName first.
	 * 
	 * @param property
	 * @return the getter method name
	 */
	public static String getGetterMethodName(String property, Object obj) {
		StringBuilder sb = new StringBuilder();
		
		sb.append(property);
		if (Character.isLowerCase(sb.charAt(0))) {
			if (sb.length() == 1 || !Character.isUpperCase(sb.charAt(1))) {
				sb.setCharAt(0, Character.toUpperCase(sb.charAt(0)));
			}
		}
		
		if (obj instanceof Boolean) {
			sb.insert(0, "is"); //$NON-NLS-1$
		} else {
			sb.insert(0, "get"); //$NON-NLS-1$
		}
		
		return sb.toString();
	}
	
	/**
	 * JavaBeans rules:
	 * 
	 * eMail > seteMail() firstName > setFirstName() URL > setURL() XAxis >
	 * setXAxis() a > setA() B > invalid - this method assumes that this is not
	 * the case. Call getValidPropertyName first. Yaxis > invalid - this method
	 * assumes that this is not the case. Call getValidPropertyName first.
	 * 
	 * @param property
	 * @return the setter method name
	 */
	public static String getSetterMethodName(String property) {
		StringBuilder sb = new StringBuilder();
		
		sb.append(property);
		if (Character.isLowerCase(sb.charAt(0))) {
			if (sb.length() == 1 || !Character.isUpperCase(sb.charAt(1))) {
				sb.setCharAt(0, Character.toUpperCase(sb.charAt(0)));
			}
		}
		
		sb.insert(0, "set"); //$NON-NLS-1$
		
		return sb.toString();
	}
	
	public static String getCamelCaseString(String inputString, boolean firstCharacterUppercase) {
		StringBuilder sb = new StringBuilder();
		
		boolean nextUpperCase = false;
		for (int i = 0; i < inputString.length(); i++) {
			char c = inputString.charAt(i);
			 
			switch (c) {
				case '_':
				case '-':
				case '@':
				case '$':
				case '#':
				case ' ':
				case '/':
				case '&':
					if (sb.length() > 0) {
						nextUpperCase = true;
					}
					break;
				
				default:
					if (nextUpperCase) {
						sb.append(Character.toUpperCase(c));
						nextUpperCase = false;
					} else if(sb.length() == 0){
						sb.append(Character.toLowerCase(c));
						//
					}else{
						sb.append(c);
					}
					
					break;
			}
		}
		
		if (firstCharacterUppercase) {
			sb.setCharAt(0, Character.toUpperCase(sb.charAt(0)));
		}
		
		return sb.toString();
	}
	
	/**
	 * This method ensures that the specified input string is a valid Java
	 * property name. The rules are as follows:
	 * 
	 * 1. If the first character is lower case, then OK 2. If the first two
	 * characters are upper case, then OK 3. If the first character is upper
	 * case, and the second character is lower case, then the first character
	 * should be made lower case
	 * 
	 * eMail > eMail firstName > firstName URL > URL XAxis > XAxis a > a B > b
	 * Yaxis > yaxis
	 * 
	 * @param inputString
	 * @return the valid property name
	 */
	public static String getValidPropertyName(String inputString) {
		String answer;
		
		if (inputString == null) {
			answer = null;
		} else if (inputString.length() < 2) {
			answer = inputString.toLowerCase(Locale.US);
		} else {
			if (Character.isUpperCase(inputString.charAt(0))
				&& !Character.isUpperCase(inputString.charAt(1))) {
				answer = inputString.substring(0, 1).toLowerCase(Locale.US)
							+ inputString.substring(1);
			} else {
				answer = inputString;
			}
		}
		
		return answer;
	}
}
